<?php
class test_thread_run extends Thread
{
    public $url;
    public $data;

    public function __construct($url)
    {
        $this->url = $url;
    }

    public function run()
    {
        if(($url = $this->url))
        {
            $this->data = model_http_curl_get($url);
        }
    }
}

function model_thread_result_get($urls_array)
{
    foreach ($urls_array as $key => $value)
    {
        $thread_array[$key] = new test_thread_run($value["url"]);
        $thread_array[$key]->start();
    }

    foreach ($thread_array as $thread_array_key => $thread_array_value)
    {
        while($thread_array[$thread_array_key]->isRunning())
        {
            usleep(10);
        }
        if($thread_array[$thread_array_key]->join())
        {
            $variable_data[$thread_array_key] = $thread_array[$thread_array_key]->data;
        }
    }
    return $variable_data;
}

function model_http_curl_get($url,$userAgent="")
{
    $userAgent = $userAgent ? $userAgent : 'Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.2)';
    $curl = curl_init();
    curl_setopt($curl, CURLOPT_URL, $url);
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($curl, CURLOPT_TIMEOUT, 5);
    curl_setopt($curl, CURLOPT_USERAGENT, $userAgent);
    $result = curl_exec($curl);
    curl_close($curl);
    return $result;
}

for ($i=0; $i < 100; $i++)
{
    $urls_array[] = array("name" => "baidu", "url" => "http://www.baidu.com/s?wd=".mt_rand(10000,20000));
}

$t = microtime(true);
$result = model_thread_result_get($urls_array);
$e = microtime(true);
echo "多线程：".($e-$t)."\n";

$t = microtime(true);
foreach ($urls_array as $key => $value)
{
    $result_new[$key] = model_http_curl_get($value["url"]);
}
$e = microtime(true);
echo "For循环：".($e-$t)."\n";
?>